@article{
  author = {Hekmatifarid, Samad, Agajani, Habib, Mirzaye, Hosein},
  title = {East / West Azerbaijan, Ardabil and Zanjan provinces place, relative privileges and characteristics in the country’s national economy},
  journal = {The Journal of Productivity Management},
  year = {2009},
  volume = {2},
  number = {4},
  pages = {189-215},
  doi = {}
}